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Below is a false color image showing a stretch of beach on Edisto Island, where the colors on the image represent the data values — in this case, elevation. The term "false color" simply means that the image is not a photograph, and that you should use the color bar on the image to interpret what the colors mean. The inlet on the southern end of Edingsville Beach seems to not have moved very much at all since the shoreline data (the white vector behind the Beach Mapping data) was collected. You can make a similar image using the BeachMapper software application provided on the second volume of this CD-ROM set. For more information about the BeachMapper Application, click here.
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Portable Document Format (PDF) maps have been created to show LIDAR data for South Carolina's beaches and islands. PDF maps will allow you to zoom in on the data and print the maps at better resolution. However, because of the intense density of the data, the PDF files will not draw properly from your browser. If you have Adobe Acrobat Reader® software installed on your computer, you can view the maps by navigating to the pdf/islands directory on this CD-ROM and double click on a file. A directory of maps is available in the readme.txt file. Adobe Acrobat Reader software has been provided on this CD-ROM.
To learn more about PDF documents and installing the software need to view them, click here.
Edisto Beach, the only barrier island located in Colleton County, is situated between the South Edisto River and Jeremy Inlet to the south and north, respectively. The northeastern third of the 4-mile beachfront is a state park and includes campsites, while the remainder of the island is primarily single-family residential. An extensive groin field (34 groins) was installed between 1948 and 1975 to stabilize the shoreline position. The beach was renourished in 1954 with 850,000 cubic yards of sediment dredged from the "Yacht Basin," formerly a section of salt marsh landward of the island. The fill consisted of considerable amounts of shell, and today the beach is composed of coarse shell hash and possesses a steep beach face.
Although the long-term trend on Edisto is generally accretional, in recent years the beach has experienced considerable amount of dune scarping and upper-beach erosion. Emergency beach scarping was necessary in 1994 within the state park. A 12,000-foot section of the beach was renourished in 1995 with 138,500 cubic yards of sand dredged from an offshore ebb-tidal shoal 2,500 feet off of "The Point" at the south end of the island. A number of groins were rehabilitated at this time.
Beach profile surveys are conducted in the spring and fall at approximately 400 monitoring stations throughout the State of South Carolina. Various agencies participate in the beach profile collection, including The South Carolina Department of Health and Environmental Control (SCDHEC) Office of Ocean and Coastal Resource Management (OCRM), Coastal Carolina University, and the College of Charleston. The results of the surveys provide a snapshot of the beach face. Over time, these surveys can be compiled to determine if and how the profile of the beach is changing. Below is a map of the stations and a sample of the profiles that can be extracted from the data. The beach profile data compiled by OCRM is provided on the second volume of this CD-ROM set.
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| *South Carolina Department of
Health and Environmental Control Office of Ocean and Coastal Resource Management |
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For more information about South Carolina beach profiles see: South
Carolina's Annual State of the Beaches Report, April 1998,
SCDHEC OCRM, 1362 McMillian Ave. Suite 400, Charleston, SC 29405.
| Beach | Edisto Island |
| Construction Dates | April 24 - May 15, 1995 |
| Completion Date | 5/1995 |
| Volume of Sand (cy) | 138,500 cy |
| Unit Area Volume(cy/ft) | 13.4 cy/ft |
| Source of Sediment | Offshore ebb-tidal shoal; 2,500 ft off "The Point" (south end of Edisto); hauled by truck to fill groin compartments |
| Grain Size Characteristics Native Sediment/Fill | Native=1.0 mm - 0.18 mm (very coarse to fine from north to south) |
| Previous Nourishments | 1948-1975: 34 groins installed; 1954: ~850,000 cy sand from "Yacht Basin" |
| Length of project (Coverage) | ~12,000 ft; Reach 1: 5,387 ft; Reach 2: 3,609 ft; Reach 3: 1,375 ft |
| % Sacrificial Fill | 37% |
| Total Cost | $1.5 M (included groin repair) |
| Cost of Components | N/D |
| Cost per Unit ($/cy) | $10.83/cy (included groin repair) |
| Funding | $1M State / $.5M Town |
| Significant Storms | Offshore hurricanes Barry & Chantal, July 1995; Hurricane Erin, early August 1995 |
| Storm Results | Long-period large swells overtopped new berm and washed into Palmetto Blvd. |
| Action Taken | August 1995: Beach scraping to form small dune between groins 1 and 13; May 1996: Dune sand scraped back to beach |
| Monitoring | Coastal Science and Engineering, Inc. |
| Engineer and Contractor | Coastal Science and Engineering - Baird (CSE-Baird )/ Weeks Marine, Inc.; Great Lakes Dredge & Dock Co., Inc.; WestBank Construction, Inc. |
| Projected/Actual Lifespan | N/D |
| Historic Erosion Rates | 1854-1956:Botany Island=-34 ft/yr; Jeremy Inlet=-9 ft/yr; Collins Pier=-2.6 ft/yr with accretion at south end=+14.3 ft/yr |
| Beach Stabilization Structures | Repaired and used existing groins |
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